Schackle-strap.



W. I. BULLARD. SHAOKLE STRAP. APPLICATION FILED JUNE 22-, 1909.

Patented Dec. 5, 1911.

Vii Emmy;

TATES PATEnT" i ,WASHINGTON IRVING BUIQLARD, OF DANII'ilLSON,CONNECTICUT, ASSIGNOR TO "H.

JACOBS MANUFACTURING (30., 0F DANIEL SON, CONNECTICUT, A CORPORATION OFCONNECTICUT.

Specification of Letters Patent.

4 SHACKLE-S'IRAP.

Application filed June 23, 1909, Serial No. 503,842.

T 0 all whom it may concern:

Be it known that I, VASHINGTON IRVING Bonn-mo, a citizen of the UnitedStates, residing at Danielson, in the-county of lVindhaul and State ofConnecticut, have invented a new and useful Shackle-Strap, of which thefollowing is a Specification. 1

This inveiitioiirelates to a shackle or pick arm strap for loomsparticularly designed for use in connection with the shackles, stirrupsor pick arms of looms of the types known as the Northrup and Draperlooms.

The principal objects ofthe invention are to provide a wearing surfacefor the shackle strap that willhave a greater extent and daration thanthose of the plain leather. or canvas straps that have been usedheretofore, and that will beof such a character as to take up a greatdeal of the vibration resulting from the propulsion of the pickerstickand shuttle; also to provide a construetioii particularly adapted foruse with a made of cast iron, and having a stirruvery dim wearingsurface and a solid back- 25- ing behind it. I

' Further ob ects and advantagesof the'inveiitioii will appearhereinafter.

Reference is to be had to the accompany-.

Figure l 'is a side view of a shackle strap I 2 is aplan; and Fig. 3 isa side view on enlarged scale of the shackle strap alone.

'Theinvention is shownf as applied to a shackle strap 10 adapted to beused in con-,

nection witlra cast iron, stirrup l1, s lug strap 12, and picker stick13, the latter named feature being shown as of ordinary construction.The shackle strap 10 is shown as of a general U-shaped form and formedof a plurality of substantially conoentric' layers of canvas or similarfabric adhering to each other in compressed form. Through this strap ata-point near-the crotch passes a longitudinal rivet I l-which,strengthensthe shackle strap itself, but the principalobject 0f.'Wl1lChis to securein 'posltioniaplug This plug is shown as consistingof. aplu- 50 "fabric all arranged with their edges inthe ralit ofsubstantially concentric layers of.

twovert-ical side surfaces of the plug. The

surface layersat the rear extend alongthe The combination with, anoscillatory Patented Dec 5','1911..i j

surface 16 for'thestirrup, in this case of three to five tiniesthedurability of that se-" cured by plain leather. f

Itwill'be observed thatthejstirrup ll has an oscillatingmotion, andconsequently the convex active facet'hereof instead of .delivering 'ablow to the plug l5 wears the surface thereof hype. swinging motionalong the concave faeeidlt isfor this reason that the placingofthefabriesin the way shown n Fig. 3 is more effective than it would be ifthe wearing surface were'composed of the cutedges of the fabric. Thisinvention applies particularly to the shackle strap. Be-

cause of t-hisact-ion of thestirrup the effect is very dilferent fromthat on the lug strap -which engages the picker with a direct normalblow.

As the plug wears theinner parallel layers -are exposed and the surfacere mainsoori cave so that it does not readily get out-of shape. :It isfrequently desired to use cast ironstirrups, and the plurality ofconcave layeis of fabric in and back of the wearing a surface 16 arelocated in the positionindicated inFig. 3, because inthis'waytheypresent a firmer surface'and a more solid backing. than would otherwisebe obtained.

This is particularly advantageous when a heavy stirrup is employed,especially a cast iron one.

. Q IVhileI have illustrated and described a preferred embodiment of theinvention,"I.

am aware that many modifications can be made therein by any personskilled in the v artwithoutdeparting from the scope of -t he inventionas expressed inthe claim. Therefore I do notwish to be liiiiited to allthe de-'- tails 'of constructionshown and described, but

Vhat I do claim is:,.

rup having a convex active face, of a strap thereforcomprising a loop ofresilient vex face, said plug consisting of a plurality of layers ofcompressedfabric adhering to each other, said layers being arranged; intwo I V i 105.

connected concave. sets, those of eachsetbein'g parallel with eachother, theo'utside ones of one set fitting in the U-shaged end of the myhand, in the presence of two subscribing 100p, and those of the other'set substantially witnesses. fitting said convex face, whereby thelatter outside layer will be worn along their WASHINGTON IRVING BULLARD'5 fibers by the oscillatory motion of said face Witnesses:

therealong. ALBERT E. FAY,

In testimony whereof I have hereunto set LOUIS W. SOUTHGATE.

